Test method for molding surface deflection of car sun-roof visor

Abstract

The invention relates to a test method, particularly a test method for a molding surface deflection of a car sun-roof visor, comprising the steps of: a) acquiring the dot data by fixing the sun-roof visor on a testing tool and scanning a curved molding surface of the sun-roof visor by Scanworks to acquire the dot data of the sun-roof visor and a basic hole, b) aligning the coordinates by leading the dot data into an Imageware software, testing the coordinate figure of the basic hole for fitting a circle and finding out the center coordinate, aligning the dot data with a 3D mathematical model by utilizing the center coordinate to align the sun-roof visor with the 3D mathematical model of the sun-roof visor, c) comparing the section lines by drawing out the section lines on the sun-roof visor and the 3D mathematical model thereof, and then directly calculating the molding surface deflection of the sun-roof visor by comparing the two section lines. The invention can rapidly, exactly and fully test the molding surface deflection of the car sun-roof visor.

Description

technical field [0001] The invention relates to a detection method, in particular to a detection method for the surface deformation of a sunshade plate of an automobile sunroof. Background technique [0002] At present, mid-to-high-end cars all have sunroof sun visors. The car sunroof sunshade is an important part that covers the car sunroof glass, can move back and forth, plays a decorative role, and has sound insulation and heat insulation performance. Car sunroof sun visors are mainly formed by pressing soft materials, and the formed sun visors are easily deformed, resulting in gaps between the sun roof sun visor and the surrounding metal and plastic parts when loading the car, resulting in unsmooth movement of the sunroof sun visor. There will be abnormal noise when the vehicle is running. In the current situation that people have higher and higher requirements on the noise in the car interior, the noise generated by the deformation of the sunroof sunshade is unaccepta...

AI Technical Summary

Problems solved by technology

The car sunroof sun visor is mainly formed by pressing soft materials. The formed sun visor is easily deformed, resulting in gaps between the sun roof sun visor and the surrounding metal and plastic parts when loading the car, resulting in the unsmooth movement of the sun roof sun visor. When the vehicle is running, there will be abnormal noise

In the current situation that people have higher and higher requirements for the noise in the car interior, the noise caused by the deformation of the sunroof sunshade is unacceptable to consumers

Usually, the size profile of the sunroof sunshade can be easily detected by the engraved line on the inspection tool, but the deformation of the product surface cannot be accurately detected by the inspection tool

Since it is impossible to obtain the precise deformation of the product profile, to solve the deviation of the product profile, it can only be realized by manually modifying the mold, conducting product trial production, and then modifying the mold cycle. This method consumes a lot of manpower and material resources, and the cycle is as long as possible. 2 to 3 months, affecting production efficiency

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